EP0596778A1 - One-piece accumulators battery having a cooling device - Google Patents

One-piece accumulators battery having a cooling device Download PDF

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Publication number
EP0596778A1
EP0596778A1 EP19930402648 EP93402648A EP0596778A1 EP 0596778 A1 EP0596778 A1 EP 0596778A1 EP 19930402648 EP19930402648 EP 19930402648 EP 93402648 A EP93402648 A EP 93402648A EP 0596778 A1 EP0596778 A1 EP 0596778A1
Authority
EP
European Patent Office
Prior art keywords
storage battery
battery according
flange
compartment
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19930402648
Other languages
German (de)
French (fr)
Other versions
EP0596778B1 (en
Inventor
Tristan Grivel
Claude Gilabert
Francis Bonnaud
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel Lucent SAS
Original Assignee
SAFT Societe des Accumulateurs Fixes et de Traction SA
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Publication date
Application filed by SAFT Societe des Accumulateurs Fixes et de Traction SA filed Critical SAFT Societe des Accumulateurs Fixes et de Traction SA
Publication of EP0596778A1 publication Critical patent/EP0596778A1/en
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Publication of EP0596778B1 publication Critical patent/EP0596778B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/112—Monobloc comprising multiple compartments
    • H01M50/114—Monobloc comprising multiple compartments specially adapted for lead-acid cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a monobloc storage battery provided with a cooling device.
  • the object of the present invention is to produce a one-piece battery provided with an efficient and space-saving cooling device, particularly well suited to the case where a large number of one-piece batteries are associated in parallel or in series.
  • the subject of the present invention is a monobloc accumulator battery provided with a device for cooling by a circulating fluid, said battery comprising a plastic casing consisting of a heat-sealed container and cover, characterized in that said cooling device comprises two plastic flanges heat-sealed in a sealed manner, respectively to two opposite walls of said housing, each of the flanges defining with the corresponding wall a circulation compartment having at its upper part an inlet orifice and an outlet orifice for said fluid.
  • the walls of the tank carrying the flanges of the walls thinner than the usual walls; the mechanical rigidity of the housing is then ensured by the flanges themselves, to which the thickness adapted to this function can be given.
  • said wall and / or said flange is provided with a plurality of ribs forming, in said compartment, baffles for the circulation of said fluid.
  • the ribs are heat-sealed to the flange / or to the wall during the heat-sealing operation of the flange with the wall.
  • the welding of the ribs limits the deformation of the flange under the effect of the pressure of the circulating fluid.
  • the ribs can be vertical or inclined.
  • the ribs which extend from the top of said compartment, a space of the order of 1 to 3 mm between their end and the top of said compartment to allow the evacuation of gas bubbles.
  • the flanges can be heat-sealed to the cover at the same time as the tray.
  • the plastics which can be used can be chosen from polypropylene, polypropylene copolymers, for example ABS, etc.
  • a water box is interposed between each inlet or outlet orifice and the circulation compartment.
  • This water box can be integrated into the heat-sealed flange, or be integrated into the tank, on the longitudinal wall carrying the flange or on the side wall adjacent to that which carries the flange.
  • said fluid inlet and outlet orifices are located in the cover.
  • the latter then carries teats to which fluid supply pipes can be connected.
  • FIGS. 1 and 2 show a one-piece accumulator battery 1 according to the invention. It may in particular be a battery of lead, nickel-cadmium, nickel-metal hydride, nickel-zinc accumulators. Its plastic housing consists of a container 6 and a heat-sealed cover 7. The longitudinal walls 2 and 3, the side walls 8 and 9, and the terminals 4 and 5 have been referenced.
  • two flanges 12 and 13 of plastic material are heat sealed in a sealed manner on the longitudinal walls 2 and 3, which define fluid circulation compartments with the corresponding walls.
  • Reference 14 has been made to the inlet and outlet ports for the fluid at the top of the compartments.
  • the fluid is for example a mixture of water and ethylene glycol in an amount of 20% to 35% of ethylene glycol by mass.
  • the flow rate is for example of the order of a few tens of liters per hour.
  • the walls 2 and 3 of the battery In order to make cooling even more efficient, provision is made (see FIG. 3) for the walls 2 and 3 of the battery to comprise a series of four ribs 10 and three ribs 10 'which are also heat-sealed with the flange 12 and which define baffles. for fluid circulation, as indicated by the arrows.
  • the ribs 10 'leave from the bottom of the compartment. Against by the ribs 10 are not in contact with the upper edge 16 of the compartment, but are offset from 1 to 3 mm, so as to allow the escape of gas bubbles, without disturbing the flow of the coolant.
  • the ribs also have the advantage of stiffening the flanges and of preventing their deformation under the effect of the pressure of the fluid essential for circulation.
  • the number of ribs and their inclination can be chosen according to the characteristics desired for the flow of the fluid.
  • FIG. 4A and 4B We find in more detail in Figures 4A and 4B the wall 2 of the tank and the cover 7 heat sealed.
  • the weld bead 21 is hidden by a flange 20 of the cover which creates an additional thickness, for example of 2.5 mm, relative to the external face of the wall 2, the latter itself having a thickness of 2 mm.
  • the flange 13 2.5 mm thick defines a compartment 22 3 mm thick.
  • the flange 13 is extended by a teat 23 with an internal diameter of 5 mm and creating, with respect to the internal face of the wall 2, an additional thickness of 13.5 mm.
  • FIGS. 5A and 5B we find the wall 2 and a cover 7 'associated with a flange 13'.
  • the flange 13 'and the wall 2 are heat-sealed simultaneously to the cover 7' along a weld bead 21 'hidden by a flange 20' of the cover.
  • the orifice 14 'and the teat 23' then belong to the cover 7 '.
  • the extra thickness created with respect to the internal face of the wall 2 is only 12 mm.
  • the rim 20 or 20 ′ can be reduced or eliminated.
  • FIGS 8, 9 and 10 illustrate three variants of the cooling device where the nipple is incorporated into the battery cover.
  • FIG. 8 shows a one-piece battery tray 36 with a longitudinal wall 32 provided with ribs 30 and a flange 34 on which a flange 35 is heat sealed.
  • a water box 38 communicating with the compartment defined by the wall 32 and the flange 35 is integrated by molding in the upper part of the tank 36.
  • the cover 37 has a recess 39 carrying a nipple 33 and coming in line with the water box 38; the assembly is heat sealed.
  • the water box 38 'no longer forms an integral part of the tank 36, but of the flange 35' added and heat-sealed, itself carrying ribs 30 '.
  • FIGS. 8 and 9 appear in top view in FIG. 6.
  • the water box 48 which communicates with the circulation compartment is no longer located, as in FIG. 8 on the longitudinal wall 42 of the tank, but on the adjacent side wall 45.
  • the cover 47 then has a recess 49 covering the water box 48.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Monobloc battery of accumulators, fitted with a device for cooling by a fluid in circulation, the said battery comprising a plastic casing consisting of a container (6) and a lid (7) which are heat-welded, characterised in that the said cooling device includes two plastic flanges (12, 13) heat-welded in leaktight manner, respectively to two opposite walls (3, 2) of the said casing, each of the flanges defining, with the corresponding wall, a circulation compartment having, at its upper part, an inlet orifice (14) and an outlet orifice (14) for the said fluid. <IMAGE>

Description

La présente invention concerne une batterie d'accumulateurs monobloc munie d'un dispositif de refroidissement.The present invention relates to a monobloc storage battery provided with a cooling device.

On sait que les différents états d'utilisation d'une batterie d'accumulateurs (charge, surcharge, décharge) conduisent à des élévations de la température qui modifient ses performances. Ainsi une batterie d'accumulateurs Nickel-Cadmium 6 volts-100 Ah dégage au cours d'une décharge à 100 Ampères environ 450kjoules.It is known that the different states of use of a storage battery (charging, overcharging, discharging) lead to increases in temperature which modify its performance. Thus a nickel-cadmium accumulator 6 volts-100 Ah releases during a discharge at 100 Amps approximately 450kjoules.

Ceci présente des inconvénients :

  • Si on recharge à chaud cette batterie, la capacité chargée est inférieure à la capacité stockable à la température ambiante.
  • Le maintien à une température élevée risque d'entraîner une dégradation des séparateurs, et par conséquent une diminution de la durée de vie de la batterie.
  • Lorsque plusieurs batteries monoblocs sont associées en série ou en parallèle, et que leurs températures sont différentes, on aboutit à une énergie de décharge alignée sur les performances les plus faibles et un risque d'inversion en fin de décharge. Il convient donc d'homogénéiser les températures de toutes les batteries ainsi regroupées. Un problème de ce genre se pose en particulier pour l'alimentation des véhicules électriques.
This has drawbacks:
  • If this battery is hot-charged, the charged capacity is less than the capacity that can be stored at room temperature.
  • Maintaining a high temperature may cause degradation of the separators, and therefore a decrease in the life of the battery.
  • When several monoblock batteries are associated in series or in parallel, and their temperatures are different, the result is a discharge energy aligned with the lowest performances and a risk of reversal at the end of discharge. It is therefore advisable to standardize the temperatures of all the batteries thus grouped. A problem of this kind arises in particular for the supply of electric vehicles.

Le moyen le plus couramment utilisé jusqu'à présent est une circulation d'air entre les batteries monoblocs. Dans le cas d'un véhicule électrique où les batteries sont disposées en différents endroits pour des questions de masse et de place disponible, il est extrêmement difficile d'assurer par ce moyen une homogénéisation correcte de la température. L'efficacité du refroidissement n'est pas bonne. Il faut écarter notablement les batteries monoblocs les unes des autres pour assurer la circulation de l'air, et ceci accroît l'encombrement.The most commonly used means so far is air circulation between the one-piece batteries. In the case of an electric vehicle where the batteries are arranged in different places for reasons of mass and available space, it is extremely difficult to ensure by this means correct homogenization of the temperature. The cooling efficiency is not good. One-piece batteries must be moved apart from each other to ensure air circulation, and this increases the bulk.

On a proposé aussi d'accoler, au moins sur deux faces opposées de la batterie monobloc des récipients métalliques parallélépipédiques où circule un liquide de refroidissement, tel que l'eau. On a constaté qu'une telle installation était encore trop encombrante et n'assurait pas une évacuation suffisante de la chaleur.It has also been proposed to attach, at least on two opposite faces of the one-piece battery, parallelepiped metal containers in which a coolant circulates, such as water. It was found that such an installation was still too bulky and did not provide sufficient heat dissipation.

La présente invention a pour but de réaliser une batterie monobloc muni d'un dispositif de refroidissement efficace et peu encombrant, particulièrement bien adapté au cas où un grand nombre de batteries monoblocs sont associées en parallèle ou en série.The object of the present invention is to produce a one-piece battery provided with an efficient and space-saving cooling device, particularly well suited to the case where a large number of one-piece batteries are associated in parallel or in series.

La présente invention a pour objet une batterie d'accumulateurs monobloc munie d'un dispositif de refroidissement par un fluide en circulation, ladite batterie comprenant un boîtier en matière plastique constitué d'un bac et d'un couvercle thermosoudés, caractérisée par le fait que ledit dispositif de refroidissement comporte deux flasques en matière plastique thermosoudés de manière étanche, respectivement à deux parois opposées dudit boîtier, chacun des flasques définissant avec la paroi correspondante un compartiment de circulation présentant à sa partie supérieure un orifice d'entrée et un orifice de sortie pour ledit fluide.The subject of the present invention is a monobloc accumulator battery provided with a device for cooling by a circulating fluid, said battery comprising a plastic casing consisting of a heat-sealed container and cover, characterized in that said cooling device comprises two plastic flanges heat-sealed in a sealed manner, respectively to two opposite walls of said housing, each of the flanges defining with the corresponding wall a circulation compartment having at its upper part an inlet orifice and an outlet orifice for said fluid.

Afin d'améliorer encore l'évacuation de la chaleur, on peut choisir pour les parois du bac portant les flasques des parois plus minces que les parois habituelles ; la rigidité mécanique du boîtier est alors assurée par les flasques eux-mêmes auxquels on peut donner l'épaisseur adaptée à cette fonction.To further improve the evacuation of heat, one can choose for the walls of the tank carrying the flanges of the walls thinner than the usual walls; the mechanical rigidity of the housing is then ensured by the flanges themselves, to which the thickness adapted to this function can be given.

De préférence, ladite paroi et/ou ledit flasque est munie d'une pluralité de nervures formant, dans ledit compartiment, des chicanes pour la circulation dudit fluide.Preferably, said wall and / or said flange is provided with a plurality of ribs forming, in said compartment, baffles for the circulation of said fluid.

Les nervures se trouvent thermosoudées au flasque/ou à la paroi au cours de l'opération de thermosoudure du flasque avec la paroi.The ribs are heat-sealed to the flange / or to the wall during the heat-sealing operation of the flange with the wall.

La soudure des nervures limite la déformation du flasque sous l'effet de la pression du fluide en circulation.The welding of the ribs limits the deformation of the flange under the effect of the pressure of the circulating fluid.

Les nervures peuvent être verticales ou inclinées.The ribs can be vertical or inclined.

De préférence, on prévoit pour les nervures qui partent du haut dudit compartiment, un espace de l'ordre de 1 à 3 mm entre leur extrémité et le haut dudit compartiment pour permettre l'évacuation des bulles de gaz.Preferably, provision is made for the ribs which extend from the top of said compartment, a space of the order of 1 to 3 mm between their end and the top of said compartment to allow the evacuation of gas bubbles.

Les flasques peuvent être thermosoudés au couvercle en même temps que le bac. Les matières plastiques utilisables peuvent être choisies parmi le polypropylène, les copolymères de polypropylène, par exemple l'ABS...The flanges can be heat-sealed to the cover at the same time as the tray. The plastics which can be used can be chosen from polypropylene, polypropylene copolymers, for example ABS, etc.

Selon un mode de réalisation préférentiel, une boîte à eau est interposée entre chaque orifice d'entrée ou de sortie et le compartiment de circulation.According to a preferred embodiment, a water box is interposed between each inlet or outlet orifice and the circulation compartment.

Cette boîte à eau peut être intégrée au flasque thermosoudé, ou être intégrée au bac, sur la paroi longitudinale portant le flasque ou sur la paroi latérale adjacente à celle qui porte le flasque.This water box can be integrated into the heat-sealed flange, or be integrated into the tank, on the longitudinal wall carrying the flange or on the side wall adjacent to that which carries the flange.

Pour des raisons d'encombrement, il est préférable que lesdits orifices d'entrée et de sortie du fluide soient situés dans le couvercle. Ce dernier porte alors des tétines sur lesquelles peuvent être branchés des tuyaux d'alimentation en fluide.For reasons of space, it is preferable that said fluid inlet and outlet orifices are located in the cover. The latter then carries teats to which fluid supply pipes can be connected.

D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante de modes de réalisation donnés à titre illustratif mais nullement limitatif. Dans le dessin annexé :

  • La figure 1 est une vue schématique en élévation longitudinale d'une batterie selon l'invention.
  • La figure 2 est une vue schématique en élévation latérale de la batterie de la figure 1.
  • La figure 3 montre schématiquement, en vue longitudinale arrachée, la structure des chicanes à l'intérieur d'un compartiment de circulation de fluide appartenant à une batterie selon l'invention.
  • Les figures 4A et 4B sont des vues schématiques partielles respectivement en coupe et en vue de dessus d'une variante de batterie selon l'invention.
  • Les figures 5A et 5B sont analogues aux figures 4A et 4B pour une autre variante de batterie selon l'invention.
  • Les figures 6 et 7 sont des vues de dessus schématiques de deux variantes de batterie selon l'invention.
  • Les figures 8, 9, 10 sont des vues partielles en perspective montrant plus en détail trois variantes de dispositif de refroidissement selon l'invention.
Other characteristics and advantages of the present invention will appear during the following description of embodiments given by way of illustration but in no way limitative. In the attached drawing:
  • Figure 1 is a schematic view in longitudinal elevation of a battery according to the invention.
  • Figure 2 is a schematic side elevation view of the battery of Figure 1.
  • FIG. 3 schematically shows, in cutaway longitudinal view, the structure of the baffles inside a fluid circulation compartment belonging to a battery according to the invention.
  • Figures 4A and 4B are partial schematic views respectively in section and in top view of a battery variant according to the invention.
  • Figures 5A and 5B are similar to Figures 4A and 4B for another variant of battery according to the invention.
  • Figures 6 and 7 are schematic top views of two battery variants according to the invention.
  • Figures 8, 9, 10 are partial perspective views showing in more detail three variants of the cooling device according to the invention.

On voit dans les figures 1 et 2 une batterie d'accumulateurs monobloc 1 selon l'invention. Il peut s'agir notamment d'une batterie d'accumulateurs au plomb, nickel-cadmium, nickel-métal hydrure, nickel-zinc. Son boîtier en matière plastique est constitué d'un bac 6 et d'un couvercle 7 thermosoudés. On a référencé les parois longitudinales 2 et 3, les parois latérales 8 et 9, et les bornes 4 et 5.FIGS. 1 and 2 show a one-piece accumulator battery 1 according to the invention. It may in particular be a battery of lead, nickel-cadmium, nickel-metal hydride, nickel-zinc accumulators. Its plastic housing consists of a container 6 and a heat-sealed cover 7. The longitudinal walls 2 and 3, the side walls 8 and 9, and the terminals 4 and 5 have been referenced.

Selon l'invention, on thermosoude de manière étanche sur les parois longitudinales 2 et 3 deux flasques 12 et 13 en matière plastique qui définissent avec les parois correspondantes des compartiments de circulation de fluide. On a référencé 14 des orifices d'entrée et de sortie pour le fluide à la partie supérieure des compartiments. Le fluide est par exemple un mélange d'eau et d'éthylène glycol à raison de 20 % à 35 % d'éthylène glycol en masse. Le débit est par exemple de l'ordre de quelques dizaines de litres à l'heure.According to the invention, two flanges 12 and 13 of plastic material are heat sealed in a sealed manner on the longitudinal walls 2 and 3, which define fluid circulation compartments with the corresponding walls. Reference 14 has been made to the inlet and outlet ports for the fluid at the top of the compartments. The fluid is for example a mixture of water and ethylene glycol in an amount of 20% to 35% of ethylene glycol by mass. The flow rate is for example of the order of a few tens of liters per hour.

Afin de rendre encore plus efficace le refroidissement on prévoit (cf figure 3) que les parois 2 et 3 de la batterie comportent une série de quatre nervures 10 et de trois nervures 10' qui sont également thermosoudées à la flasque 12 et qui définissent des chicanes pour la circulation du fluide, comme indiqué par les flèches.In order to make cooling even more efficient, provision is made (see FIG. 3) for the walls 2 and 3 of the battery to comprise a series of four ribs 10 and three ribs 10 'which are also heat-sealed with the flange 12 and which define baffles. for fluid circulation, as indicated by the arrows.

Les nervures 10' partent du fond du compartiment. Par contre les nervures 10 ne sont pas au contact du bord supérieur 16 du compartiment, mais en sont décalées de 1 à 3 mm, de manière à permettre l'échappement de bulles de gaz, sans perturber l'écoulement du fluide de refroidissement.The ribs 10 'leave from the bottom of the compartment. Against by the ribs 10 are not in contact with the upper edge 16 of the compartment, but are offset from 1 to 3 mm, so as to allow the escape of gas bubbles, without disturbing the flow of the coolant.

Les nervures ont en outre l'avantage de rigidifier les flasques et d'éviter leur déformation sous l'effet de la pression du fluide indispensable à la circulation.The ribs also have the advantage of stiffening the flanges and of preventing their deformation under the effect of the pressure of the fluid essential for circulation.

Le nombre des nervures et leur inclinaison peuvent être choisis en fonction des caractéristiques souhaitées pour l'écoulement du fluide.The number of ribs and their inclination can be chosen according to the characteristics desired for the flow of the fluid.

On retrouve plus en détail dans les figures 4A et 4B la paroi 2 du bac et le couvercle 7 thermosoudés. Le cordon de soudure 21 est caché par un rebord 20 du couvercle qui crée une surépaisseur, par exemple de 2,5 mm, par rapport à la face externe de la paroi 2, cette dernière ayant elle-même une épaisseur de 2 mm. Le flasque 13 d'épaisseur 2,5 mm définit un compartiment 22 d'épaisseur 3 mm. Au niveau de l'orifice 14, le flasque 13 est prolongé par une tétine 23 de diamètre intérieur 5 mm et créant vis-à-vis de la face interne de la paroi 2 une surépaisseur de 13,5 mm.We find in more detail in Figures 4A and 4B the wall 2 of the tank and the cover 7 heat sealed. The weld bead 21 is hidden by a flange 20 of the cover which creates an additional thickness, for example of 2.5 mm, relative to the external face of the wall 2, the latter itself having a thickness of 2 mm. The flange 13 2.5 mm thick defines a compartment 22 3 mm thick. At the orifice 14, the flange 13 is extended by a teat 23 with an internal diameter of 5 mm and creating, with respect to the internal face of the wall 2, an additional thickness of 13.5 mm.

Dans les figures 5A et 5B, on retrouve la paroi 2 et un couvercle 7' associés à un flasque 13'. Le flasque 13' et la paroi 2 sont thermosoudés simultanément au couvercle 7' suivant un cordon de soudure 21' caché par un rebord 20' du couvercle. L'orifice 14' et la tétine 23' appartiennent alors au couvercle 7'. Dans ce cas la surépaisseur créée vis-à-vis de la face interne de la paroi 2 n'est que de 12 mm.In FIGS. 5A and 5B, we find the wall 2 and a cover 7 'associated with a flange 13'. The flange 13 'and the wall 2 are heat-sealed simultaneously to the cover 7' along a weld bead 21 'hidden by a flange 20' of the cover. The orifice 14 'and the teat 23' then belong to the cover 7 '. In this case, the extra thickness created with respect to the internal face of the wall 2 is only 12 mm.

Selon un autre mode de réalisation, on peut réduire ou supprimer le rebord 20 ou 20'.According to another embodiment, the rim 20 or 20 ′ can be reduced or eliminated.

Si l'on tient compte de l'épaisseur du tuyau d'alimentation en fluide branché sur les tétines 23 et 23', on observe qu'elle n'accroît en rien la surépaisseur globale dans le cas de la variante des figures 5A et 5B, alors qu'elle l'accroît dans le cas de la variante des figures 4A et 4B.If the thickness of the fluid supply pipe connected to the teats 23 and 23 ′ is taken into account, it is observed that it in no way increases the overall excess thickness in the case of the variant of FIGS. 5A and 5B , whereas it increases it in the case of the variant of FIGS. 4A and 4B.

Les figures 8, 9 et 10 illustrent trois variantes de dispositif de refroidissement où la tétine est incorporée au couvercle de la batterie.Figures 8, 9 and 10 illustrate three variants of the cooling device where the nipple is incorporated into the battery cover.

On voit dans la figure 8 un bac de batterie monobloc 36 avec une paroi longitudinale 32 muni de nervures 30 et d'un rebord 34 sur lesquels est thermosoudé un flasque 35. Une boîte à eau 38 communiquant avec le compartiment défini par la paroi 32 et le flasque 35 est intégrée par moulage à la partie supérieure du bac 36. Le couvercle 37 présente un décrochement 39 portant une tétine 33 et venant au droit de la boîte à eau 38 ; l'ensemble est thermosoudé de manière étanche.FIG. 8 shows a one-piece battery tray 36 with a longitudinal wall 32 provided with ribs 30 and a flange 34 on which a flange 35 is heat sealed. A water box 38 communicating with the compartment defined by the wall 32 and the flange 35 is integrated by molding in the upper part of the tank 36. The cover 37 has a recess 39 carrying a nipple 33 and coming in line with the water box 38; the assembly is heat sealed.

Dans le cas de la figure 9, la boîte à eau 38' ne fait plus partie intégrante du bac 36, mais du flasque 35' rapporté et thermosoudé, portant lui-même des nervures 30'.In the case of FIG. 9, the water box 38 'no longer forms an integral part of the tank 36, but of the flange 35' added and heat-sealed, itself carrying ribs 30 '.

Les variantes des figures 8 et 9 apparaissent en vue de dessus dans la figure 6.The variants of FIGS. 8 and 9 appear in top view in FIG. 6.

Dans la variante de la figure 10, qui apparaît en vue de dessus dans la figure 7, on a référencé la paroi longitudinale 42 et ses nervures 40 destinées à recevoir un flasque 44. Le bord de thermosoudure est référencé 43.In the variant of FIG. 10, which appears in top view in FIG. 7, the longitudinal wall 42 and its ribs 40 intended to receive a flange 44 are referenced. The heat-sealing edge is referenced 43.

La boîte à eau 48 qui communique avec le compartiment de circulation n'est plus située, comme dans la figure 8 sur la paroi longitudinale 42 du bac, mais sur la paroi latérale adjacente 45. Le couvercle 47 présente alors un décrochement 49 venant recouvrir la boîte à eau 48.The water box 48 which communicates with the circulation compartment is no longer located, as in FIG. 8 on the longitudinal wall 42 of the tank, but on the adjacent side wall 45. The cover 47 then has a recess 49 covering the water box 48.

Bien entendu l'invention n'est pas limitée aux modes de réalisation qui viennent d'être décrits. On pourra, sans sortir du cadre de l'invention, remplacer tout moyen par un moyen équivalent, notamment en vue de l'optimisation de l'encombrement du dispositif de refroidissement.Of course, the invention is not limited to the embodiments which have just been described. Without departing from the scope of the invention, any means can be replaced by equivalent means, in particular with a view to optimizing the size of the cooling device.

Claims (9)

1/ Batterie d'accumulateurs monobloc munie d'un dispositif de refroidissement par un fluide en circulation, ladite batterie comprenant un boîtier en matière plastique constitué d'un bac et d'un couvercle thermosoudés, caractérisée par le fait que ledit dispositif de refroidissement comporte deux flasques en matière plastique thermosoudés de manière étanche, respectivement à deux parois opposées dudit boîtier, chacun des flasques définissant avec la paroi correspondante un compartiment de circulation présentant à sa partie supérieure un orifice d'entrée et un orifice de sortie pour ledit fluide. 1 / Monobloc storage battery provided with a device for cooling by a circulating fluid, said battery comprising a plastic casing consisting of a heat-sealed container and cover, characterized in that said cooling device comprises two plastic flanges heat sealed in a sealed manner, respectively at two opposite walls of said housing, each of the flanges defining with the corresponding wall a circulation compartment having at its upper part an inlet orifice and an outlet for said fluid. 2/ Batterie d'accumulateurs selon la revendication 1, caractérisée par le fait que ladite paroi et/ou ledit flasque est munie d'une pluralité de nervures formant, dans ledit compartiment, des chicanes pour la circulation dudit fluide. 2 / storage battery according to claim 1, characterized in that said wall and / or said flange is provided with a plurality of ribs forming, in said compartment, baffles for the circulation of said fluid. 3/ Batterie d'accumulateurs selon la revendication 2, caractérisée par le fait que, pour lesdites nervures partant du haut dudit compartiment, on prévoit entre leur extrémité et le haut dudit compartiment un espace de l'ordre de 1 à 3 mm destiné à l'évacuation des bulles de gaz. 3 / storage battery according to claim 2, characterized in that, for said ribs extending from the top of said compartment, there is provided between their end and the top of said compartment a space of the order of 1 to 3 mm intended for the evacuation of gas bubbles. 4/ Batterie d'accumulateurs selon l'une des revendications précédentes, caractérisée par le fait que lesdits orifices d'entrée et de sortie du fluide sont situés dans ledit couvercle. 4 / storage battery according to one of the preceding claims, characterized in that said fluid inlet and outlet ports are located in said cover. 5/ Batterie d'accumulateurs selon la revendication 4, caractérisée par le fait que lesdits flasques et ledit bac sont thermosoudés audit couvercle en même temps. 5 / storage battery according to claim 4, characterized in that said flanges and said tank are heat sealed to said cover at the same time. 6/ Batterie d'accumulateurs selon la revendication 4, caractérisée par le fait qu'une boîte à eau est interposée entre chacun desdits orifices et ledit compartiment. 6 / storage battery according to claim 4, characterized in that a water box is interposed between each of said orifices and said compartment. 7/ Batterie d'accumulateurs selon la revendication 6, caractérisée par le fait que ladite boîte à eau est intégrée dans ledit flasque. 7 / storage battery according to claim 6, characterized in that said water box is integrated in said flange. 8/ Batterie d'accumulateurs selon la revendication 6, caractérisée par le fait que ladite boîte à eau est intégrée dans la partie supérieure dudit bac sur la même paroi que ledit flasque. 8 / storage battery according to claim 6, characterized in that said water box is integrated in the upper part of said tank on the same wall as said flange. 9/ Batterie d'accumulateurs selon la revendication 6, caractérisée par le fait que ladite boîte à eau est intégrée dans la partie supérieure d'une paroi latérale dudit bac adjacente à celle sur laquelle se trouve ledit flasque. 9 / storage battery according to claim 6, characterized in that said water box is integrated in the upper part of a side wall of said tank adjacent to that on which is located said flange.
EP19930402648 1992-11-02 1993-10-28 One-piece accumulators battery having a cooling device Expired - Lifetime EP0596778B1 (en)

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FR9213087 1992-11-02
FR9213087A FR2697678B1 (en) 1992-11-02 1992-11-02 Monobloc storage battery fitted with a cooling device.

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EP0596778B1 EP0596778B1 (en) 1999-10-06

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US9985268B2 (en) 2013-09-06 2018-05-29 Johnson Controls Technology Company Battery module housing and method of making the same
FR3013515A1 (en) * 2013-11-15 2015-05-22 Valeo Systemes Thermiques COOLING DEVICE FOR AUTOMOTIVE BATTERY
FR3071964A1 (en) * 2017-09-29 2019-04-05 Psa Automobiles Sa BATTERY WITH STORAGE MODULES AND INTERNAL EXCHANGE PLATES CONNECTED FROM OUTSIDE TO OUTSIDE
FR3084209A1 (en) * 2018-07-23 2020-01-24 Valeo Systemes Thermiques COOLING SYSTEM FOR ELECTRICAL COMPONENT

Also Published As

Publication number Publication date
DE69326665D1 (en) 1999-11-11
DE69326665T2 (en) 2000-05-31
US5510207A (en) 1996-04-23
US5641589A (en) 1997-06-24
FR2697678A1 (en) 1994-05-06
EP0596778B1 (en) 1999-10-06
JPH06215804A (en) 1994-08-05
JP3556251B2 (en) 2004-08-18
FR2697678B1 (en) 1994-12-16

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